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C4 help needed

Hey guys,

I'm a little confused by when you can't integrate a curve as a whole and you have to do it in two parts why is that?


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Original post by Medicjug
Hey guys,

I'm a little confused by when you can't integrate a curve as a whole and you have to do it in two parts why is that?


Posted from TSR Mobile


Can you quote an example because I'm not sure what you mean.
Reply 2
Avatar for math42
math42
20
If you mean integrating to find the area under a curve, sections where the curve is negative will have a negative integral; you will have to integrate them separately and take the absolute value of the integral

If you mean integration with parametric coordinates, often there is symmetry involved which makes it sensible to just integrate one part and then multiply the value by the appropriate constant
Reply 3
Avatar for Rbutton
Rbutton
13
Original post by Medicjug
Hey guys,

I'm a little confused by when you can't integrate a curve as a whole and you have to do it in two parts why is that?

Posted from TSR Mobile


I think it just makes integrating it easier
if the curve goes underneath the x axis you need to do that bit separately from the bits above the x axis. the underneath integral comes out negative... you then snip off the minus sign and add it to the other bits which are already positive ?

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